Modern medicine doesn't consider having extramarital sex as an act of perversion, so their opinion is not applicable to us Muslims in this topic. By Islamic standards, Yes. Fornication, Homosexuality, etc are acts of perversion. Basically Homosexuals like to convince themselves its not their 'fault' for their wrong inclination. Usually in the west there are Questions being asked like : 'When did you realize that you are Gay/lesbian?'. Which is a propaganda to make people believe its normal to be a homosexual and some people are born Gay. Which is completely False. On the other extreme some people say it is a disease, But its out of extreme disgust of this act. But we shouldn't label it as a disease because we will be indirectly supporting the above mentioned propaganda. Its not a Psychological Disease. If its a disease then it would have been an excuse and not a Sin. Islam is clear cut in this topic, Homosexuality is not a Disease, its a Major Sin. A whole nation [Who was warned by Prophet Lut (as)] was destroyed by Allah for committing this Sin. Bro, Its just whispering of the Shaitan, the same whispers which urge us to commit Zina. I think many Men will have experienced whispers like 'I am more of a lady' 'i wish i was a girl' etc etc. Its just false beliefs that are injected into people to think they are 'wired' differently. No 'imbalance' involved. Auzhubillahi minashaitanir rajeem.